When the engine is cold, an extra rich air/fuel mixture is required. That leads to a high concentration of unburnt fuel in the exhaust system. By adding air in the exhaust system, the fuel can be re-ignited, reducing hydrocarbon pollution. It also heats up the catalytic converter so that the rare metal catalysts can accelerate the conversion of HC and CO into CO2 and H2O.
Ecotec 2.2 Engine Whine?
- Thread starter Blue_Goose
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Originally Posted By: Johnny
Alternator, belt, or belt tensioner pulley.
Or maybe power steering.
Ive had 2 GMs with 3800s which had a similar noise. Turned out to be the tensioner pulley each time. The factory ones look like plastic to me, the replacements are steel.
Alternator, belt, or belt tensioner pulley.
Or maybe power steering.
Ive had 2 GMs with 3800s which had a similar noise. Turned out to be the tensioner pulley each time. The factory ones look like plastic to me, the replacements are steel.
i have the same problem on a chevy van.
sounds like its got a blower on it.
time to go over to motion industries and get a good bearing pressed into it.
the replacement on it now is 6 months old.
made in china of course!.
the plastic one i took off made a angry beehive sound at idle.
sounds like its got a blower on it.
time to go over to motion industries and get a good bearing pressed into it.
the replacement on it now is 6 months old.
made in china of course!.
the plastic one i took off made a angry beehive sound at idle.
Originally Posted By: kc8adu
i have the same problem on a chevy van.
sounds like its got a blower on it.
time to go over to motion industries and get a good bearing pressed into it.
the replacement on it now is 6 months old.
made in china of course!.
the plastic one i took off made a angry beehive sound at idle.
What did you replace? Tensioner Pulley?
Goose
i have the same problem on a chevy van.
sounds like its got a blower on it.
time to go over to motion industries and get a good bearing pressed into it.
the replacement on it now is 6 months old.
made in china of course!.
the plastic one i took off made a angry beehive sound at idle.
What did you replace? Tensioner Pulley?
Goose
Whenever the tensioner pulley went out on a GM car, all my employers would order a new Gates tensioner. That always worked well, and lasted a long time.
Am I correct in saying that you guys think the whine might be from the tensioner pulley?...I thought that would make a clacking noise if it went south
Goose
Goose
JTK
$100 Site Donor 2025
Goose, so your noise doesn't go away? Like I say, mine fades totally away once the engine comes up to temp. I've had bad idlers, tensioners, etc on other GMs. Those stayed constant.
Joel
Joel
Noise does not go away..stays with me from start to finish
Goose
Goose
Originally Posted By: Blue_Goose
Originally Posted By: kc8adu
i have the same problem on a chevy van.
sounds like its got a blower on it.
time to go over to motion industries and get a good bearing pressed into it.
the replacement on it now is 6 months old.
made in china of course!.
the plastic one i took off made a angry beehive sound at idle.
What did you replace? Tensioner Pulley?
Goose
yes.
its just a roller with a sealed ball bearing in the center.
bolts to the tensioner arm through the bearing.
Originally Posted By: kc8adu
i have the same problem on a chevy van.
sounds like its got a blower on it.
time to go over to motion industries and get a good bearing pressed into it.
the replacement on it now is 6 months old.
made in china of course!.
the plastic one i took off made a angry beehive sound at idle.
What did you replace? Tensioner Pulley?
Goose
yes.
its just a roller with a sealed ball bearing in the center.
bolts to the tensioner arm through the bearing.
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